/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --cacsl2boogietranslator.allow.undefined.functions true --traceabstraction.smt.solver External_ModelsAndUnsatCoreMode --traceabstraction.command.for.external.solver 'cvc4 --incremental --print-success --lang smt' -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/bitvector-loops/overflow_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-356b6ba-m [2024-10-31 19:33:22,422 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 19:33:22,488 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-10-31 19:33:22,498 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 19:33:22,499 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 19:33:22,525 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 19:33:22,525 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 19:33:22,526 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 19:33:22,526 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 19:33:22,526 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 19:33:22,527 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 19:33:22,527 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 19:33:22,527 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 19:33:22,528 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 19:33:22,528 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 19:33:22,532 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 19:33:22,532 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 19:33:22,533 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 19:33:22,533 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 19:33:22,533 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 19:33:22,533 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 19:33:22,537 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 19:33:22,537 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 19:33:22,537 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 19:33:22,537 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-31 19:33:22,537 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 19:33:22,537 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-31 19:33:22,538 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 19:33:22,538 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 19:33:22,538 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 19:33:22,538 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 19:33:22,538 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 19:33:22,538 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 19:33:22,539 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 19:33:22,539 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 19:33:22,539 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 19:33:22,539 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 19:33:22,539 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 19:33:22,539 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-31 19:33:22,540 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:22,540 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 19:33:22,540 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 19:33:22,540 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 19:33:22,541 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 19:33:22,541 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-31 19:33:22,541 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Command for external solver -> cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:22,777 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 19:33:22,793 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 19:33:22,795 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 19:33:22,796 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 19:33:22,796 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 19:33:22,798 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector-loops/overflow_1-2.c [2024-10-31 19:33:24,054 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 19:33:24,171 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 19:33:24,171 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector-loops/overflow_1-2.c [2024-10-31 19:33:24,176 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c6c2bf93/115ac9d4d69b414f98a7436e7f5e36ab/FLAGa9269c724 [2024-10-31 19:33:24,185 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c6c2bf93/115ac9d4d69b414f98a7436e7f5e36ab [2024-10-31 19:33:24,188 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 19:33:24,189 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-10-31 19:33:24,190 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 19:33:24,190 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 19:33:24,195 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 19:33:24,195 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 07:33:24" (1/1) ... [2024-10-31 19:33:24,196 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1349897d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:33:24, skipping insertion in model container [2024-10-31 19:33:24,196 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 07:33:24" (1/1) ... [2024-10-31 19:33:24,210 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 19:33:24,334 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector-loops/overflow_1-2.c[324,337] [2024-10-31 19:33:24,341 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 19:33:24,352 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 19:33:24,362 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector-loops/overflow_1-2.c[324,337] [2024-10-31 19:33:24,363 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 19:33:24,376 INFO L204 MainTranslator]: Completed translation [2024-10-31 19:33:24,378 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:33:24 WrapperNode [2024-10-31 19:33:24,378 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 19:33:24,379 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 19:33:24,379 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 19:33:24,379 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 19:33:24,384 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:33:24" (1/1) ... [2024-10-31 19:33:24,389 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:33:24" (1/1) ... [2024-10-31 19:33:24,400 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 22 [2024-10-31 19:33:24,401 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 19:33:24,401 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 19:33:24,401 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 19:33:24,401 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 19:33:24,408 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:33:24" (1/1) ... [2024-10-31 19:33:24,409 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:33:24" (1/1) ... [2024-10-31 19:33:24,411 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:33:24" (1/1) ... [2024-10-31 19:33:24,418 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-31 19:33:24,418 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:33:24" (1/1) ... [2024-10-31 19:33:24,418 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:33:24" (1/1) ... [2024-10-31 19:33:24,420 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:33:24" (1/1) ... [2024-10-31 19:33:24,423 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:33:24" (1/1) ... [2024-10-31 19:33:24,423 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:33:24" (1/1) ... [2024-10-31 19:33:24,424 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:33:24" (1/1) ... [2024-10-31 19:33:24,425 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 19:33:24,425 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 19:33:24,425 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 19:33:24,425 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 19:33:24,426 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:33:24" (1/1) ... [2024-10-31 19:33:24,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 19:33:24,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 19:33:24,449 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 19:33:24,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 19:33:24,468 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 19:33:24,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 19:33:24,468 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 19:33:24,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-31 19:33:24,513 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 19:33:24,515 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 19:33:24,599 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-10-31 19:33:24,600 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 19:33:24,608 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 19:33:24,608 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-31 19:33:24,609 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 07:33:24 BoogieIcfgContainer [2024-10-31 19:33:24,609 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 19:33:24,610 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 19:33:24,611 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 19:33:24,613 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 19:33:24,613 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 07:33:24" (1/3) ... [2024-10-31 19:33:24,613 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5389485c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 07:33:24, skipping insertion in model container [2024-10-31 19:33:24,614 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 07:33:24" (2/3) ... [2024-10-31 19:33:24,614 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5389485c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 07:33:24, skipping insertion in model container [2024-10-31 19:33:24,614 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 07:33:24" (3/3) ... [2024-10-31 19:33:24,615 INFO L112 eAbstractionObserver]: Analyzing ICFG overflow_1-2.c [2024-10-31 19:33:24,626 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 19:33:24,626 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 19:33:24,672 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 19:33:24,677 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@49940a89, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 19:33:24,678 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-31 19:33:24,682 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:24,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-10-31 19:33:24,686 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:33:24,686 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-31 19:33:24,687 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:33:24,692 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:33:24,692 INFO L85 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2024-10-31 19:33:24,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:33:24,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911715805] [2024-10-31 19:33:24,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:33:24,701 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:24,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:33:24,703 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-10-31 19:33:24,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (2)] Waiting until timeout for monitored process [2024-10-31 19:33:24,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:33:24,768 INFO L255 TraceCheckSpWp]: Trace formula consists of 18 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-31 19:33:24,771 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:33:24,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 19:33:24,809 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:33:24,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 19:33:24,824 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:33:24,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911715805] [2024-10-31 19:33:24,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1911715805] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 19:33:24,825 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 19:33:24,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2024-10-31 19:33:24,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855553877] [2024-10-31 19:33:24,827 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 19:33:24,830 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 19:33:24,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:33:24,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 19:33:24,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 19:33:24,849 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:24,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:33:24,874 INFO L93 Difference]: Finished difference Result 21 states and 27 transitions. [2024-10-31 19:33:24,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 19:33:24,876 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-10-31 19:33:24,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:33:24,881 INFO L225 Difference]: With dead ends: 21 [2024-10-31 19:33:24,881 INFO L226 Difference]: Without dead ends: 9 [2024-10-31 19:33:24,883 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 19:33:24,885 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 19:33:24,885 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 19:33:24,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2024-10-31 19:33:24,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2024-10-31 19:33:24,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:24,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2024-10-31 19:33:24,907 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2024-10-31 19:33:24,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:33:24,908 INFO L471 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2024-10-31 19:33:24,908 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:24,908 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2024-10-31 19:33:24,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-10-31 19:33:24,908 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:33:24,909 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-10-31 19:33:24,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (2)] Forceful destruction successful, exit code 0 [2024-10-31 19:33:25,110 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:25,111 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:33:25,111 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:33:25,112 INFO L85 PathProgramCache]: Analyzing trace with hash 292915403, now seen corresponding path program 1 times [2024-10-31 19:33:25,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:33:25,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306351861] [2024-10-31 19:33:25,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:33:25,112 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:25,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:33:25,115 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-10-31 19:33:25,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (3)] Waiting until timeout for monitored process [2024-10-31 19:33:25,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:33:25,171 INFO L255 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-31 19:33:25,172 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:33:25,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 19:33:25,206 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:33:25,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 19:33:25,249 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:33:25,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1306351861] [2024-10-31 19:33:25,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1306351861] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 19:33:25,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 19:33:25,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-10-31 19:33:25,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823721118] [2024-10-31 19:33:25,250 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 19:33:25,251 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 19:33:25,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:33:25,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 19:33:25,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-10-31 19:33:25,255 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:25,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:33:25,311 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2024-10-31 19:33:25,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 19:33:25,312 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-10-31 19:33:25,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:33:25,312 INFO L225 Difference]: With dead ends: 17 [2024-10-31 19:33:25,312 INFO L226 Difference]: Without dead ends: 13 [2024-10-31 19:33:25,313 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2024-10-31 19:33:25,314 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-31 19:33:25,314 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-31 19:33:25,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2024-10-31 19:33:25,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2024-10-31 19:33:25,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:25,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2024-10-31 19:33:25,318 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 8 [2024-10-31 19:33:25,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:33:25,318 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2024-10-31 19:33:25,318 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:25,318 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2024-10-31 19:33:25,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-31 19:33:25,319 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:33:25,319 INFO L215 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2024-10-31 19:33:25,322 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (3)] Ended with exit code 0 [2024-10-31 19:33:25,520 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:25,521 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:33:25,521 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:33:25,521 INFO L85 PathProgramCache]: Analyzing trace with hash -967103989, now seen corresponding path program 2 times [2024-10-31 19:33:25,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:33:25,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218055352] [2024-10-31 19:33:25,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:33:25,522 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:25,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:33:25,523 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-10-31 19:33:25,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2024-10-31 19:33:25,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:33:25,570 INFO L255 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-31 19:33:25,572 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:33:25,640 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 19:33:25,641 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:33:25,776 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 19:33:25,777 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:33:25,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218055352] [2024-10-31 19:33:25,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [218055352] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 19:33:25,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 19:33:25,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2024-10-31 19:33:25,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946646685] [2024-10-31 19:33:25,777 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 19:33:25,778 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-10-31 19:33:25,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:33:25,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-10-31 19:33:25,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2024-10-31 19:33:25,779 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 16 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:26,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:33:26,028 INFO L93 Difference]: Finished difference Result 25 states and 32 transitions. [2024-10-31 19:33:26,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-31 19:33:26,029 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-10-31 19:33:26,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:33:26,030 INFO L225 Difference]: With dead ends: 25 [2024-10-31 19:33:26,030 INFO L226 Difference]: Without dead ends: 21 [2024-10-31 19:33:26,031 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=186, Invalid=320, Unknown=0, NotChecked=0, Total=506 [2024-10-31 19:33:26,031 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 19:33:26,032 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 19:33:26,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-10-31 19:33:26,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-10-31 19:33:26,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:26,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2024-10-31 19:33:26,040 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 12 [2024-10-31 19:33:26,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:33:26,040 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2024-10-31 19:33:26,041 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:26,041 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2024-10-31 19:33:26,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-10-31 19:33:26,041 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:33:26,041 INFO L215 NwaCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1] [2024-10-31 19:33:26,046 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Ended with exit code 0 [2024-10-31 19:33:26,243 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:26,244 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:33:26,244 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:33:26,244 INFO L85 PathProgramCache]: Analyzing trace with hash 2078182539, now seen corresponding path program 3 times [2024-10-31 19:33:26,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:33:26,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2084296648] [2024-10-31 19:33:26,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:33:26,245 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:26,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:33:26,248 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-10-31 19:33:26,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2024-10-31 19:33:26,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:33:26,304 INFO L255 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-31 19:33:26,306 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:33:26,483 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 19:33:26,483 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:33:26,857 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 19:33:26,857 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:33:26,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2084296648] [2024-10-31 19:33:26,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2084296648] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 19:33:26,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 19:33:26,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2024-10-31 19:33:26,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882692590] [2024-10-31 19:33:26,858 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 19:33:26,859 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-10-31 19:33:26,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:33:26,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-10-31 19:33:26,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=706, Unknown=0, NotChecked=0, Total=992 [2024-10-31 19:33:26,862 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 32 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:27,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:33:27,794 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2024-10-31 19:33:27,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-10-31 19:33:27,795 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-10-31 19:33:27,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:33:27,795 INFO L225 Difference]: With dead ends: 41 [2024-10-31 19:33:27,796 INFO L226 Difference]: Without dead ends: 37 [2024-10-31 19:33:27,796 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=762, Invalid=1400, Unknown=0, NotChecked=0, Total=2162 [2024-10-31 19:33:27,797 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 19:33:27,797 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 53 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 19:33:27,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-10-31 19:33:27,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2024-10-31 19:33:27,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:27,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2024-10-31 19:33:27,803 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 20 [2024-10-31 19:33:27,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:33:27,803 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2024-10-31 19:33:27,803 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:27,803 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2024-10-31 19:33:27,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-10-31 19:33:27,804 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:33:27,804 INFO L215 NwaCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1] [2024-10-31 19:33:27,807 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2024-10-31 19:33:28,004 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:28,005 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:33:28,005 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:33:28,005 INFO L85 PathProgramCache]: Analyzing trace with hash -24784501, now seen corresponding path program 4 times [2024-10-31 19:33:28,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:33:28,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721419445] [2024-10-31 19:33:28,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:33:28,006 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:28,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:33:28,007 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-10-31 19:33:28,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2024-10-31 19:33:28,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:33:28,079 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-31 19:33:28,091 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:33:28,523 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 19:33:28,523 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:33:29,723 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 19:33:29,724 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:33:29,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721419445] [2024-10-31 19:33:29,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [721419445] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 19:33:29,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 19:33:29,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 64 [2024-10-31 19:33:29,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553184282] [2024-10-31 19:33:29,724 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 19:33:29,725 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-10-31 19:33:29,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:33:29,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-10-31 19:33:29,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1086, Invalid=2946, Unknown=0, NotChecked=0, Total=4032 [2024-10-31 19:33:29,728 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 64 states, 64 states have (on average 1.0625) internal successors, (68), 64 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:34,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:33:34,934 INFO L93 Difference]: Finished difference Result 73 states and 104 transitions. [2024-10-31 19:33:34,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2024-10-31 19:33:34,935 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.0625) internal successors, (68), 64 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-10-31 19:33:34,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:33:34,936 INFO L225 Difference]: With dead ends: 73 [2024-10-31 19:33:34,936 INFO L226 Difference]: Without dead ends: 69 [2024-10-31 19:33:34,937 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=3066, Invalid=5864, Unknown=0, NotChecked=0, Total=8930 [2024-10-31 19:33:34,938 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 1080 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 1107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-31 19:33:34,938 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 98 Invalid, 1107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1080 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-31 19:33:34,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-10-31 19:33:34,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2024-10-31 19:33:34,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 68 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:34,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2024-10-31 19:33:34,946 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 36 [2024-10-31 19:33:34,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:33:34,947 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2024-10-31 19:33:34,947 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.0625) internal successors, (68), 64 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:33:34,947 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2024-10-31 19:33:34,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-10-31 19:33:34,948 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:33:34,948 INFO L215 NwaCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1] [2024-10-31 19:33:34,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2024-10-31 19:33:35,148 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:35,149 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:33:35,149 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:33:35,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1750489995, now seen corresponding path program 5 times [2024-10-31 19:33:35,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:33:35,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1332484468] [2024-10-31 19:33:35,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:33:35,150 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:33:35,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:33:35,151 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-10-31 19:33:35,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2024-10-31 19:33:35,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:33:35,262 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-10-31 19:33:35,265 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:33:36,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 19:33:36,529 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:33:40,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 19:33:40,592 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:33:40,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1332484468] [2024-10-31 19:33:40,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1332484468] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 19:33:40,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 19:33:40,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 128 [2024-10-31 19:33:40,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510083848] [2024-10-31 19:33:40,592 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 19:33:40,593 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2024-10-31 19:33:40,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:33:40,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2024-10-31 19:33:40,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4222, Invalid=12034, Unknown=0, NotChecked=0, Total=16256 [2024-10-31 19:33:40,597 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand has 128 states, 128 states have (on average 1.03125) internal successors, (132), 128 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:34:17,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 19:34:17,035 INFO L93 Difference]: Finished difference Result 137 states and 200 transitions. [2024-10-31 19:34:17,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2024-10-31 19:34:17,036 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 1.03125) internal successors, (132), 128 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2024-10-31 19:34:17,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 19:34:17,037 INFO L225 Difference]: With dead ends: 137 [2024-10-31 19:34:17,037 INFO L226 Difference]: Without dead ends: 133 [2024-10-31 19:34:17,042 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1953 ImplicationChecksByTransitivity, 40.1s TimeCoverageRelationStatistics Valid=12282, Invalid=24008, Unknown=0, NotChecked=0, Total=36290 [2024-10-31 19:34:17,042 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 4179 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 4238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 4179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-10-31 19:34:17,042 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 197 Invalid, 4238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 4179 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-10-31 19:34:17,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-10-31 19:34:17,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2024-10-31 19:34:17,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.0075757575757576) internal successors, (133), 132 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:34:17,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2024-10-31 19:34:17,058 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 68 [2024-10-31 19:34:17,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 19:34:17,059 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2024-10-31 19:34:17,059 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 1.03125) internal successors, (132), 128 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 19:34:17,059 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2024-10-31 19:34:17,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2024-10-31 19:34:17,061 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 19:34:17,061 INFO L215 NwaCegarLoop]: trace histogram [126, 1, 1, 1, 1, 1, 1] [2024-10-31 19:34:17,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2024-10-31 19:34:17,262 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-10-31 19:34:17,262 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 19:34:17,263 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 19:34:17,263 INFO L85 PathProgramCache]: Analyzing trace with hash -33591413, now seen corresponding path program 6 times [2024-10-31 19:34:17,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 19:34:17,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [911857446] [2024-10-31 19:34:17,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 19:34:17,263 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-10-31 19:34:17,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-10-31 19:34:17,264 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-10-31 19:34:17,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2024-10-31 19:34:17,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 19:34:17,486 INFO L255 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 128 conjuncts are in the unsatisfiable core [2024-10-31 19:34:17,493 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 19:34:22,287 INFO L134 CoverageAnalysis]: Checked inductivity of 8001 backedges. 0 proven. 8001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 19:34:22,287 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 19:34:38,352 INFO L134 CoverageAnalysis]: Checked inductivity of 8001 backedges. 0 proven. 8001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 19:34:38,352 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 19:34:38,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [911857446] [2024-10-31 19:34:38,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [911857446] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 19:34:38,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-31 19:34:38,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [129, 129] total 256 [2024-10-31 19:34:38,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376220724] [2024-10-31 19:34:38,353 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-31 19:34:38,353 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 256 states [2024-10-31 19:34:38,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 19:34:38,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 256 interpolants. [2024-10-31 19:34:38,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16638, Invalid=48642, Unknown=0, NotChecked=0, Total=65280 [2024-10-31 19:34:38,359 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand has 256 states, 256 states have (on average 1.015625) internal successors, (260), 256 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)